keyboard.lst

５１实例大全

C51 COMPILER V7.06   KEYBOARD                                                              06/10/2010 22:02:25 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE KEYBOARD
OBJECT MODULE PLACED IN .\obj\keyboard.obj
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE keyboard.c BROWSE DEBUG OBJECTEXTEND PRINT(.\obj\keyboard.lst) OBJECT(.\obj
                    -\keyboard.obj)

stmt level    source

   1          /*-----------------------------------------------
   2            名称：矩阵键盘
   3            论坛：www.doflye.net
   4            编写：shifang
   5            日期：2009.5
   6            修改：无
   7            内容：
   8          ------------------------------------------------*/
   9          #include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义
  10          #include"keyboard.h"
  11          #include"delay.h"
  12          
  13          #define KeyPort P3
  14          
  15          /*------------------------------------------------
  16          按键扫描函数，返回扫描键值
  17          ------------------------------------------------*/
  18          unsigned char KeyScan(void)  //键盘扫描函数，使用行列反转扫描法
  19          {
  20   1       unsigned char cord_h,cord_l;//行列值中间变量
  21   1       KeyPort=0x0f;            //行线输出全为0
  22   1       cord_h=KeyPort&0x0f;     //读入列线值
  23   1       if(cord_h!=0x0f)    //先检测有无按键按下
  24   1       {
  25   2        DelayMs(10);        //去抖
  26   2        if((KeyPort&0x0f)!=0x0f)
  27   2        {
  28   3          cord_h=KeyPort&0x0f;  //读入列线值
  29   3          KeyPort=cord_h|0xf0;  //输出当前列线值
  30   3          cord_l=KeyPort&0xf0;  //读入行线值
  31   3      
  32   3          while((KeyPort&0xf0)!=0xf0);//等待松开并输出
  33   3      
  34   3          return(cord_h+cord_l);//键盘最后组合码值
  35   3         }
  36   2        }return(0xff);     //返回该值
  37   1      }
  38          /*------------------------------------------------
  39                    按键值处理函数，返回扫键值
  40                     可以根据需要改变返回值
  41          
  42                                  | 1 | 2 | 3 | + |  
  43                                  | 4 | 5 | 6 | - |  
  44                                  | 7 | 8 | 9 | * |  
  45                                  | 0 | . | = | / | 
  46          ------------------------------------------------*/
  47          unsigned char KeyPro(void)
  48          {
  49   1       switch(KeyScan())
  50   1       {
  51   2        case 0x7e:return '1';break;//0 按下相应的键显示相对应的码值
  52   2        case 0x7d:return '2';break;//1
  53   2        case 0x7b:return '3';break;//2
  54   2        case 0x77:return '+';break;//3
C51 COMPILER V7.06   KEYBOARD                                                              06/10/2010 22:02:25 PAGE 2   

  55   2      
  56   2        case 0xbe:return '4';break;//4
  57   2        case 0xbd:return '5';break;//5
  58   2        case 0xbb:return '6';break;//6
  59   2        case 0xb7:return '-';break;//7
  60   2      
  61   2        case 0xde:return '7';break;//8
  62   2        case 0xdd:return '8';break;//9
  63   2        case 0xdb:return '9';break;//a
  64   2        case 0xd7:return 'x';break;//b
  65   2      
  66   2        case 0xee:return '0';break;//c
  67   2        case 0xed:return '.';break;//d
  68   2        case 0xeb:return '=';break;//e
  69   2        case 0xe7:return '/';break;//f
  70   2        default:return 0xff;break;
  71   2       }
  72   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    167    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)